1 files changed, 150 insertions, 0 deletions
diff --git a/libgo/go/syslog/syslog.go b/libgo/go/syslog/syslog.go
new file mode 100644
index 000000000..711d5ddc7
--- /dev/null
+++ b/libgo/go/syslog/syslog.go
@@ -0,0 +1,150 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The syslog package provides a simple interface to
+// the system log service. It can send messages to the
+// syslog daemon using UNIX domain sockets, UDP, or
+// TCP connections.
+package syslog
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+)
+
+type Priority int
+
+const (
+	// From /usr/include/sys/syslog.h.
+	// These are the same on Linux, BSD, and OS X.
+	LOG_EMERG Priority = iota
+	LOG_ALERT
+	LOG_CRIT
+	LOG_ERR
+	LOG_WARNING
+	LOG_NOTICE
+	LOG_INFO
+	LOG_DEBUG
+)
+
+// A Writer is a connection to a syslog server.
+type Writer struct {
+	priority Priority
+	prefix   string
+	conn     serverConn
+}
+
+type serverConn interface {
+	writeBytes(p Priority, prefix string, b []byte) (int, os.Error)
+	writeString(p Priority, prefix string, s string) (int, os.Error)
+	close() os.Error
+}
+
+type netConn struct {
+	conn net.Conn
+}
+
+// New establishes a new connection to the system log daemon.
+// Each write to the returned writer sends a log message with
+// the given priority and prefix.
+func New(priority Priority, prefix string) (w *Writer, err os.Error) {
+	return Dial("", "", priority, prefix)
+}
+
+// Dial establishes a connection to a log daemon by connecting
+// to address raddr on the network net.
+// Each write to the returned writer sends a log message with
+// the given priority and prefix.
+func Dial(network, raddr string, priority Priority, prefix string) (w *Writer, err os.Error) {
+	if prefix == "" {
+		prefix = os.Args[0]
+	}
+	var conn serverConn
+	if network == "" {
+		conn, err = unixSyslog()
+	} else {
+		var c net.Conn
+		c, err = net.Dial(network, "", raddr)
+		conn = netConn{c}
+	}
+	return &Writer{priority, prefix, conn}, err
+}
+
+// Write sends a log message to the syslog daemon.
+func (w *Writer) Write(b []byte) (int, os.Error) {
+	if w.priority > LOG_DEBUG || w.priority < LOG_EMERG {
+		return 0, os.EINVAL
+	}
+	return w.conn.writeBytes(w.priority, w.prefix, b)
+}
+
+func (w *Writer) writeString(p Priority, s string) (int, os.Error) {
+	return w.conn.writeString(p, w.prefix, s)
+}
+
+func (w *Writer) Close() os.Error { return w.conn.close() }
+
+// Emerg logs a message using the LOG_EMERG priority.
+func (w *Writer) Emerg(m string) (err os.Error) {
+	_, err = w.writeString(LOG_EMERG, m)
+	return err
+}
+// Crit logs a message using the LOG_CRIT priority.
+func (w *Writer) Crit(m string) (err os.Error) {
+	_, err = w.writeString(LOG_CRIT, m)
+	return err
+}
+// ERR logs a message using the LOG_ERR priority.
+func (w *Writer) Err(m string) (err os.Error) {
+	_, err = w.writeString(LOG_ERR, m)
+	return err
+}
+
+// Warning logs a message using the LOG_WARNING priority.
+func (w *Writer) Warning(m string) (err os.Error) {
+	_, err = w.writeString(LOG_WARNING, m)
+	return err
+}
+
+// Notice logs a message using the LOG_NOTICE priority.
+func (w *Writer) Notice(m string) (err os.Error) {
+	_, err = w.writeString(LOG_NOTICE, m)
+	return err
+}
+// Info logs a message using the LOG_INFO priority.
+func (w *Writer) Info(m string) (err os.Error) {
+	_, err = w.writeString(LOG_INFO, m)
+	return err
+}
+// Debug logs a message using the LOG_DEBUG priority.
+func (w *Writer) Debug(m string) (err os.Error) {
+	_, err = w.writeString(LOG_DEBUG, m)
+	return err
+}
+
+func (n netConn) writeBytes(p Priority, prefix string, b []byte) (int, os.Error) {
+	return fmt.Fprintf(n.conn, "<%d>%s: %s\n", p, prefix, b)
+}
+
+func (n netConn) writeString(p Priority, prefix string, s string) (int, os.Error) {
+	return fmt.Fprintf(n.conn, "<%d>%s: %s\n", p, prefix, s)
+}
+
+func (n netConn) close() os.Error {
+	return n.conn.Close()
+}
+
+// NewLogger provides an object that implements the full log.Logger interface,
+// but sends messages to Syslog instead; flag is passed as is to Logger;
+// priority will be used for all messages sent using this interface.
+// All messages are logged with priority p.
+func NewLogger(p Priority, flag int) *log.Logger {
+	s, err := New(p, "")
+	if err != nil {
+		return nil
+	}
+	return log.New(s, "", flag)
+}